Veterinary Society of
Surgical Oncology

General Considerations

  • OSA and CSA are the most common scapular tumors
  • scapular OSA had a similar biologic behaviour to appendicular OSA
  • telangiectatic OSA of the scapula is associated with the highest rate of metastasis
  • diagnosis: survey radiographs ± CT
  • 90% of the scapula can be excised with good to excellent function

Treatment

  • partial or total scapulectomy
  • lateral recumbency with affected thoracic limb uppermost
  • lateral approach to spine of scapula
  • trapezius, omotransversarius and rhomboideus muscles dissected close to their origins on the scapula
  • acromial and spinous heads of deltoideus dissected close to their origins on the scapula
  • deep dissection started dorsally with lateral retraction of scapula and elevation of serratus ventralis muscle
  • brachial plexus and axillary artery and vein identified and preserved
  • coracobrachialis, teres minor, infraspinatus, supraspinatus, and subscapularis tendons are transected at the humerus
  • teres major and long head of the triceps muscles separated from their insertions on the caudal scapula
  • osteotomy of glenoid tubercle performed to preserve tendon of origin of the biceps brachialis
  • scapula removed with attached infraspinatus, supraspinatus, and subscapularis muscles
  • postoperative chemotherapy is recommended for dogs with scapular OSA
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